why is most of the mass of an atom in the nucleus

The mass of a sample of NH₃ containing 3.80 × 10²⁴ molecules of NH₃ is the product of the number of moles and the molar mass of NH₃.

To find the mass of a sample of NH₃ containing 3.80 × 10²⁴ molecules of NH₃.

Step 1: Determine the number of moles of NH₃
We know that there are 6.022 × 10²³ molecules in one mole of any substance (Avogadro's number). To find the number of moles of NH₃, divide the given number of molecules by Avogadro's number:
Number of moles = (3.80 × 10²⁴ molecules) / (6.022 × 10²³ molecules/mol)

Step 2: Calculate the molar mass of NH₃
NH₃ consists of one nitrogen (N) atom and three hydrogen (H) atoms. The atomic mass of nitrogen is approximately 14 g/mol, and the atomic mass of hydrogen is approximately 1 g/mol. So the molar mass of NH₃ is:
Molar mass of NH₃= (1 × 14 g/mol) + (3 × 1 g/mol) = 14 + 3 = 17 g/mol

Step 3: Find the mass of the sample
Now that we know the number of moles and the molar mass, we can find the mass of the sample by multiplying the two values:
Mass of the sample = Number of moles × Molar mass of NH₃

The mass of a sample of NH₃ containing 3.80 × 10²⁴ molecules of NH₃ is the product of the number of moles (calculated in step 1) and the molar mass of NH₃ (calculated in step 2).

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Answer:

I believe this is called the 'molar mass'

Dalton's atomic model, proposed by John Dalton in 1803, was one of the first scientific explanations of the nature of atoms. It is based on four key ideas: Atoms are indivisible and indestructible; Atoms of different elements have different atomic weights; Atoms of the same element are identical; Atoms combine in definite ratios to form compounds.

Atoms are indivisible and indestructible. This means that atoms cannot be broken down into smaller particles, and they cannot be created or destroyed.

Atoms of different elements have different atomic weights. This means that atoms of one element are different from atoms of another element based on their weight.

Atoms of the same element are identical. This means that all atoms of a given element have the same properties and characteristics.

Atoms combine in definite ratios to form compounds. This means that when atoms of different elements combine to form a compound, they do so in a specific ratio.

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The atomic number of this atom is 3.

Atomic Number =Number of Protons .

Here protons=3, Neutrons=4 and Electrons=3. So, The atomic number of this atom is 3.

The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number (symbol Z). This is equivalent to the proton number (np), or the number of protons present in the nucleus of each atom of that element, for conventional nuclei.

Ordinary chemical elements can be uniquely identified by their atomic number. The atomic number and the number of electrons are both equal in a regular, uncharged atom.

The atomic mass number A of a regular atom is calculated by adding its neutron number N and neutron number Z. Since the mass of electrons is negligible for many uses, protons and neutrons have roughly equal masses, thus the mass defect of a nucleon.

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For reaction 09.13C, the major organic product is 1-bromo-2-methylpropane,  09.13c- 2-bromo-2-methylpropane, 09.13d- 1-bromo-1-methylcyclohexane, 09.13e-  1-bromo-3-methylcyclopentane and for 09.13f, the major organic product is 1-bromo-1-ethylcyclopentane.



In all of these reactions, HBr is added to an alkene to form a bromoalkane. The addition of HBr follows Markovnikov's rule, where the hydrogen atom adds to the carbon atom with the most hydrogen atoms attached to it, and the bromine atom adds to the carbon atom with the least hydrogen atoms attached to it. This results in the formation of a more substituted bromoalkane, which is the major product.

For reaction 09.13C, the starting material is a primary alkene, which results in the formation of 1-bromo-2-methylpropane as the major product. In reaction 09.13c, the starting material is a secondary alkene, which results in the formation of 2-bromo-2-methylpropane as the major product.

In reactions 09.13d, 09.13e, and 09.13f, cyclic alkenes are used as starting materials. In these cases, the bromine atom adds to the most substituted carbon of the ring, resulting in the formation of the corresponding bromocycloalkane as the major product.

In summary, the major product of these reactions is determined by Markovnikov's rule, which states that the hydrogen atom adds to the carbon atom with the most hydrogen atoms attached to it, and the halogen atom adds to the carbon atom with the least hydrogen atoms attached to it. The result is a more substituted halogenated product.

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The mixture of phenol and benzoic acid is separated by adding \(NaHCO_{3}\)  to produce brisk effervescence with sodium benzoate .

When benzoic acid react with \(NaHCO_{3}\) then sodium benzoate is produced which is soluble in water and separated from non aqueous solvent . Organic compounds are soluble in organic solvent and inorganic compound mainly soluble in inorganic solvent like water.

What is brisk effervescence?

Brisk effervescence is when continuous gas evolution occurs in a chemical reaction like CO2. When HCl is added in \(NaHCO_{3}\) then CO2 evolved.

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Answer:

Yes its possible! and im so sorry but i dont know how Srryy but it is possible if i got it wrong im so sorry have a great day!

Explanation:

Answer:

this is a homework app, not a tell people to follow your ig app

Explanation:

Lipogranuloma of the oil-secreting gland of the eyelid best describes a meibomian gland lipogranuloma.

Meibomian glands are specialized oil-secreting glands located along the eyelid margins. When there is a blockage or dysfunction of these glands, it can lead to the formation of a lipogranuloma, which is a localized inflammatory response characterized by the presence of granulomatous tissue containing lipid-laden macrophages.

Lipogranulomas in the meibomian glands can result from various factors, such as chronic inflammation, infection, or the accumulation of oil and debris. These lipogranulomas can cause symptoms such as swelling, redness, and discomfort in the affected eyelid.

Treatment may involve warm compresses, lid hygiene, and, in severe cases, surgical intervention.

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The particles inside the ball speed up, so the ball would feel as if its pumped up.

Answer

1.50 mol

Explanation

Given:

Initial volume, V₁ = 25.0 L

Mass of CH4 gas in 25.0 L container = 40 g

Final volume, V₂ = 15.0 L

From the Periodic Table; molar mass of CH4 = 16.04 g/mol

What to find:

The new amount in mole.

Step-by-step solution:

According to Avogadro’s law: For a confined gas, the volume (V) and number of moles (n) are directly proportional if the pressure and temperature both remain constant. That is:

n₁ = Mass/Molar mass = (40.0g/16.04 g/mol) = 2.493765586 mol

n₂ is the new amount in mole and can be calculated as follows:

The new amount in moles is 1.50 moles

The question requires us to choose the best option to explain why bubbles rise faster from a warm can of soda than a cold can, based on the solubility of gases in liquids.

Adding heat to a solution composed of a liquid and a gas (i.e., increasing its temperature) provides thermal energy to the gas that makes it possible to overcome the forces that maintain molecules of solvent (liquid) and solute (gas) together. In this way, the molecules of solvent and solute tend to separate, therefore decreasing the solubility of the gas. Based on this, we can say that the solubility of gases in liquids increase with increasing temperature.

Therefore, the best option to answer the question is the first one, "gases become less soluble in liquids at higher temperatures".

Answer:

50 m/s^2

Explanation:

In this case, we're using Newton's Second Law: Force = mass × acceleration.

We are given the force as 250 newtons and the mass as 50 kg, so 250/50 = 50 m/s^2.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

The acceleration is the ratio of the force applied to an object to the mass. A 50 kg rocket with a force of 250 newtons has an acceleration of 50 m/s².

Newton's second law states about a motion depicts the relationship between mass, acceleration, and force. The motion experienced by an object will be more if the force applied is more.

It is a quantitative description that relates the acceleration experienced by the body due to the applied force. It is given as,

F = m × a

Given,

Mass of water rocket (m) = 50 Kg

Force (F) = 250 N

Substituting values above:

250 N = 50 × a

a = 250 ÷ 50

= 50 m/s²

Therefore, the water rocket weighing 50 kg with a force of 250 N experiences an acceleration of 50 m/s².

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1. The percentage composition of iron in the compound is 34.4%

2. The percentage composition of chlorine in the compound is 65.6%

3. The empirical formula of the compound is FeCl₃

Percentage of Fe = (mass of Fe / mass of compound) × 100

Percentage of Fe = (143 / 416) × 100

Percentage of Fe = 34.4%

Percentage of Cl = 100 – 34.4

Percentage of Cl = 65.6%

Divide by their molar mass

Fe = 34.4 / 56 = 0.614

Cl = 65.6 / 35.5 = 1.848

Divide by the smallest

Fe = 0.614 / 0.614 = 1

Cl = 1.848 / 0.614 = 3

Thus, the empirical formula of the compound is FeCl₃

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H₂ (g) + O₂ (g) ⇒ H₂O (g) because Hydrogen and oxygen gas both exist as diatomic molecules. The water is in gaseous state due to the heat given off by the combustion reaction.

Combustion, often known as burning, is a high-temperature exothermic redox chemical reaction that occurs between a fuel and an oxidant, typically atmospheric oxygen, to generate oxidized, generally gaseous products in a mixture known as smoke. A combustion reaction is a type of chemical reaction that occurs when any combustible component reacts with an oxidiser to generate an oxidised product. Fires and the release of energy in the form of heat are frequently associated with combustion processes. A hydrocarbon generally combines with oxygen in most combustion processes to produce carbon dioxide and water.

Here,

Because hydrogen and oxygen gas exist as diatomic molecules, H2 (g) + O2 (g) = H2O (g). Because of the heat produced by the combustion reaction, the water is in a gaseous condition.

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Answer:

Two design criteria for the design of the ammonia making process are;

1) Sustainable hydrogen production by renewable energy

2)  Sustainable use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water

Explanation:

Ammonia is produced from natural gas in the following process;

H₂ + RSH → RH + H₂S

H₂S + ZnO → ZnS + H₂O (Waste water)

CH₄ + H₂O → CO + 3H₂

CO + H₂O → CO₂ + H₂

Ammonia is then produced by reacting the produced hydrogen with nitrogen in the presence of a catalyst in a process known as the Haber-Bosch process as follows;

3H₂ + N₂ → 2NH₃

The

The design criteria for the design of the ammonia making process therefore as follows;

1) Sustainable use of renewable energy to produce hydrogen gas from the electrolysis of water

2)  Use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water.

The branch of science which deals with chemicals and their bond is called chemistry.

The two ways by which we can design ammonia making process is as follows:-

Two design criteria for the design of the ammonia making process are:-

The usage of ammonia is important in these ways:-

Hence, these are the design for the ammonia-making process.

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Answer:

3.5 Kilometers

Explanation:

If he goes 7k an hour, then 30 minutes is half of that.

Hope this helps! :)

Answer:

3.5 km

Explanation:

The number of moles of the unknown compound that dissolves in the benzene solution is 1.25 moles.

The mole is a certain amount to express the amount of a substance that is microscopic in size. One mole indicates the number of particles contained in a substance whose number is equal to the number of particles in 12 grams of C-12 atoms.

The volume of benzene i.e., the solvent used = 395.0 mL.

Molality of solution = 3.63 m

And the density of benzene = 0.877 g/mL.

So:

The mass of benzene used = density x volume

The mass of benzene used = 0.877 g/mL x 395.0 mL

The mass of benzene used = 346.415 g = 0.3464 kg

Moles of the unknown compound:

Since moles of solute = molality x mass of solvent in kg

Since moles of solute = 3.63 m x 0.3464 kg

Since moles of solute = 1.25 moles.

Therefore, the answer is approximately 1.25 mol.

Your question is incomplete but most probably your full question was:

A solution made by dissolving 150.0 g of an unknown compound in 395.0 mL of benzene to make a solution which has a freezing point 18.6 °C lower than that of pure benzene. Kf for benzene is 5.12 °C/m and the density of benzene is 0.877 g/mL. The molality of the solution is 3.63 m. What quantity in moles of the unknown compound were dissolved in the solution?

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Answer:

Everything is composed of atoms! which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass.

Explanation:

Hope this helped

Answer:

John Dalton in 1808 put forward a theory known as Dalton's atomic theory. The main points of this theory are 1)Matter is made up of extremely small indivisible particles called atoms. 2) Atoms of the same element are identical in all respect i.e. shape, size, and mass.... 8)An atom can neither be created nor destroyed.

Explanation:

Answer:

plants

Explanation:

they are plant cells, happy Thanksgiving :)

Answer: photosynthetic tissues

Explanation: Chloroplasts are present in the cells of all green tissues of plants and algae. Chloroplasts are also found in photosynthetic tissues that do not appear green, such as the brown blades of giant kelp or the red leaves of certain plants.

The option that is accurate temperature for the boiling point of water is option D.) 97°.

The student has the most precise set of measurement is option A.) Felipe's measurements are more precise and his average is more accurate.

In regards to temperature, At sea level, water tends to boils at 100° C ( that is at 212° F).

Note that At higher altitudes the temperature of the boiling point is  said to be lower.

Therefore, one can say that The option that is accurate temperature for the boiling point of water is option D.) 97°.

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The magnification of the magnifying glass is approximately 1.44.

To calculate the magnification of the magnifying glass, we can use the formula:

Magnification = (image distance) / (object distance)

In this case, the magnifying glass is held 10.4 cm from the mole, so the object distance (d₀) is 10.4 cm. The focal length (f) of the magnifying glass is given as 15.0 cm.

Using the formula, we can calculate the magnification (M):

M = (image distance) / (10.4 cm)

The magnification of a magnifying glass is typically assumed to be the ratio of the image distance to the least distance of distinct vision (25 cm for a relaxed eye). Therefore, we need to find the image distance (dᵢ) in terms of the least distance of distinct vision.

Using the lens formula: 1/f = 1/d₀ + 1/dᵢ

We can rearrange the formula to solve for the image distance (dᵢ):

1/dᵢ = 1/f - 1/d₀

Substituting the given values:

1/dᵢ = 1/15 cm - 1/10.4 cm

Calculating the result:

1/dᵢ ≈ 0.0667 cm⁻¹

dᵢ ≈ 15 cm

Now we can substitute the values for image distance (dᵢ) and object distance (d₀) into the magnification formula:

M = 15 cm / 10.4 cm

Simplifying the calculation:

M ≈ 1.44

Therefore, the magnification of the magnifying glass in this scenario is approximately 1.44.

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The ^60Co will need to be replaced approximately after 6.43 years.

To determine when the ^60 Co needs to be replaced, we can use the concept of half-life and the given information that it needs to be replaced when its radioactivity falls to 85% of the original sample.

Let's denote the time it takes for the ^60 Co to reach 85% of the original sample as t. Since the half-life is 5.26 years, after t years, the radioactivity would have reduced by (1/2)^(t/5.26) of the original sample.

Setting this equal to 85% (or 0.85) of the original sample, we have:

(1/2)^(t/5.26) = 0.85

To solve for t, logarithm of both sides: (t/5.26) * log(1/2) = log(0.85)

Now, we can solve for t: t = (5.26 * log(0.85)) / log(1/2)

Calculating this expression gives us the time t in years when the ^60 Co needs to be replaced.

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The first one appear to be a pan with some liquid heating up.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The second one seems to be a ice cube melting.

Its beginning phase is solid, the phase change type is fusion, and its ending state is liquid.

The third one is water, or other liquid, making clouds.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The fourth illustration seems to be an aluminium can. There aren't really a phase change happening, but when we open the aluminium can containing gaseous drink, there are molecules of gas diluted into the liquid and some of it encouter each other to make a bubble of the gas and is released. It is not an actually phase change, it is the reverse process of diluting gas into liquid. Initially it is diluted gas, it gets released and in the end it is in gas phase.

The given text appears to be a citation or reference for a scientific paper titled "The Development of Selected Reaction Monitoring" by Bereman, M. S., Maclean, B., Tomazela, D. M., Liebler, D. C., and MacCoss, M. J. published in 2012.

Selected Reaction Monitoring (SRM) is a targeted mass spectrometry technique used for quantitative analysis in proteomics research. It is commonly employed to measure specific peptides or proteins in a complex biological sample. SRM allows for the detection and quantification of molecules of interest with high sensitivity and specificity.

In SRM, a mass spectrometer is programmed to monitor specific precursor ions and their corresponding fragment ions. This is achieved by selecting a precursor ion based on its mass-to-charge ratio (m/z) and then monitoring the specific fragment ions produced from its fragmentation. By selecting specific precursor and fragment ions, SRM enables the detection and quantification of specific peptides or proteins within a complex sample.

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Explanation:

21. The given molecule for cracking is tetradecane.

On cracking it forms one mole of decane (C10H22) and two moles of ethene gas.

The chemical equation is shown below:

\(C_1_4H_3_0->C_1_0H_2_2+2C_2H_4\)

22. The essential condition for the formation of an ester is the reaction of alcohol and acid in presence of concentrated sulfuric acid.

Thus among the given options, the first option is the correct one.

23. Isomers of butanol are shown below:

It is 2-butanol.

The position of -OH group changes to the second carbon.

Ni(OH)₂ is base but this is not strong base this is very weak base and this cannot gives OH⁻ after dissolving in H₂​​​O . this is only dissolve in acidic solution.

A solution is said to be acidic if it contains more positively charged hydrogen ions (H⁺) than negatively charged hydroxide ions (OH⁻). Lemon juice and vinegar are typical examples of acids. The amount of OH ions is greater in bases. Baking soda and regular ammonia are common examples.

Acidic substances can typically be distinguished by their sour flavor. A basic definition of an acid is a molecule that can donate an H⁺ ion and can continue to be energetically favorable even after losing H⁺. Blue litmus paper has a reputation for turning red when exposed to acids. Bases, on the other hand, are distinguished by their bitter flavor and slick consistency.

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